+++ /dev/null
-(*
- * Copyright (C) 2003:
- * Stefano Zacchiroli <zack@cs.unibo.it>
- * for the HELM Team http://helm.cs.unibo.it/
- *
- * This file is part of HELM, an Hypertextual, Electronic
- * Library of Mathematics, developed at the Computer Science
- * Department, University of Bologna, Italy.
- *
- * HELM is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * HELM is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with HELM; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- * MA 02111-1307, USA.
- *
- * For details, see the HELM World-Wide-Web page,
- * http://helm.cs.unibo.it/
- *)
-
-open Http_getter_common;;
-open Http_getter_misc;;
-open Http_getter_types;;
-open Http_getter_debugger;;
-open Printf;;
-
- (* constants *)
-
-let common_headers = [
- "Cache-Control", "no-cache";
- "Pragma", "no-cache";
- "Expires", "0"
-]
-
- (* HTTP queries argument parsing *)
-
-let parse_enc (req: Http_types.request) =
- try
- (match req#param "format" with
- | "normal" -> Enc_normal
- | "gz" -> Enc_gzipped
- | s -> raise (Http_getter_bad_request ("Invalid format: " ^ s)))
- with Http_types.Param_not_found _ -> Enc_normal
-;;
-let parse_patch (req: Http_types.request) =
- match req#param "patch_dtd" with
- | s when String.lowercase s = "yes" -> true
- | s when String.lowercase s = "no" -> false
- | s -> raise (Http_getter_bad_request ("Invalid patch_dtd value: " ^ s))
-;;
-let parse_output_format (req: Http_types.request) =
- match req#param "format" with
- | s when String.lowercase s = "txt" -> Fmt_text
- | s when String.lowercase s = "xml" -> Fmt_xml
- | s -> raise (Http_getter_bad_request ("Invalid /ls format: " ^ s))
-;;
-let parse_ls_uri =
- let parse_ls_RE = Pcre.regexp "^(\\w+):(.*)$" in
- let trailing_slash_RE = Pcre.regexp "/+$" in
- fun (req: Http_types.request) ->
- let baseuri = req#param "baseuri" in
- let subs =
- Pcre.extract ~rex:parse_ls_RE
- (Pcre.replace ~rex:trailing_slash_RE baseuri)
- in
- match (subs.(1), subs.(2)) with
- | "cic", uri -> Cic uri
- | "theory", uri -> Theory uri
- | _ -> raise (Http_getter_bad_request ("Invalid /ls baseuri: " ^ baseuri))
-;;
-
- (* global maps, shared by all threads *)
-
-let xml_map = new Http_getter_map.map Http_getter_env.xml_dbm in
-let rdf_map = new Http_getter_map.map Http_getter_env.rdf_dbm in
-let xsl_map = new Http_getter_map.map Http_getter_env.xsl_dbm in
-
-let save_maps () = xml_map#close; rdf_map#close; xsl_map#close in
-let map_of_uri = function
- | uri when is_xml_uri uri -> xml_map
- | uri when is_rdf_uri uri -> rdf_map
- | uri when is_xsl_uri uri -> xsl_map
- | uri -> raise (Http_getter_unresolvable_URI uri)
-in
-let resolve uri =
- try
- (map_of_uri uri)#resolve uri
- with Http_getter_map.Key_not_found _ ->
- raise (Http_getter_unresolvable_URI uri)
-in
-let register uri = (map_of_uri uri )#add uri in
-let return_all_foo_uris map doctype filter outchan =
- (** return all URIs contained in 'map' which satisfy predicate 'filter'; URIs
- are written in an XMLish format ('doctype' is the XML doctype) onto 'outchan'
- *)
- Http_daemon.send_basic_headers ~code:200 outchan;
- Http_daemon.send_header "Content-Type" "text/xml" outchan;
- Http_daemon.send_headers common_headers outchan;
- Http_daemon.send_CRLF outchan;
- output_string
- outchan
- (sprintf
-"<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?>
-<!DOCTYPE %s SYSTEM \"%s/getdtd?uri=%s.dtd\">
-
-<%s>
-"
- doctype
- Http_getter_env.my_own_url
- doctype
- doctype);
- map#iter
- (fun uri _ ->
- if filter uri then
- output_string outchan (sprintf "\t<uri value=\"%s\" />\n" uri));
- output_string outchan (sprintf "</%s>\n" doctype)
-in
-let return_all_xml_uris = return_all_foo_uris xml_map "alluris" in
-let return_all_rdf_uris = return_all_foo_uris rdf_map "allrdfuris" in
-let return_ls =
- let (++) (oldann, oldtypes, oldbody) (newann, newtypes, newbody) =
- ((if newann > oldann then newann else oldann),
- (if newtypes > oldtypes then newtypes else oldtypes),
- (if newbody > oldbody then newbody else oldbody))
- in
- let basepart_RE =
- Pcre.regexp "^([^.]*\\.[^.]*)((\\.body)|(\\.types))?(\\.ann)?"
- in
- let (types_RE, types_ann_RE, body_RE, body_ann_RE) =
- (Pcre.regexp "\\.types", Pcre.regexp "\\.types.ann",
- Pcre.regexp "\\.body", Pcre.regexp "\\.body.ann")
- in
- let (slash_RE, til_slash_RE, no_slashes_RE) =
- (Pcre.regexp "/", Pcre.regexp "^.*/", Pcre.regexp "^[^/]*$")
- in
- fun lsuri fmt outchan ->
- let pat =
- "^" ^
- (match lsuri with Cic p -> ("cic:" ^ p) | Theory p -> ("theory:" ^ p))
- in
- let (dir_RE, obj_RE) =
- (Pcre.regexp (pat ^ "/"), Pcre.regexp (pat ^ "(\\.|$)"))
- in
- let dirs = ref StringSet.empty in
- let objs = Hashtbl.create 17 in
- let store_dir d =
- dirs := StringSet.add (List.hd (Pcre.split ~rex:slash_RE d)) !dirs
- in
- let store_obj o =
- let basepart = Pcre.replace ~rex:basepart_RE ~templ:"$1" o in
- let oldflags =
- try
- Hashtbl.find objs basepart
- with Not_found -> (false, No, No) (* no ann, no types no body *)
- in
- let newflags =
- match o with
- | s when Pcre.pmatch ~rex:types_RE s -> (false, Yes, No)
- | s when Pcre.pmatch ~rex:types_ann_RE s -> (true, Ann, No)
- | s when Pcre.pmatch ~rex:body_RE s -> (false, No, Yes)
- | s when Pcre.pmatch ~rex:body_ann_RE s -> (true, No, Ann)
- | s -> (false, No, No)
- in
- Hashtbl.replace objs basepart (oldflags ++ newflags)
- in
- xml_map#iter (* BLEARGH Dbm module lacks support for fold-like functions *)
- (fun key _ ->
- match key with
- | uri when Pcre.pmatch ~rex:dir_RE uri -> (* directory hit *)
- let localpart = Pcre.replace ~rex:dir_RE uri in
- if Pcre.pmatch ~rex:no_slashes_RE localpart then
- store_obj localpart
- else
- store_dir localpart
- | uri when Pcre.pmatch ~rex:obj_RE uri -> (* file hit *)
- store_obj (Pcre.replace ~rex:til_slash_RE uri)
- | uri -> () (* miss *));
- match fmt with
- | Fmt_text ->
- let body =
- (List.fold_left
- (fun s d -> sprintf "%sdir, %s\n" s d) ""
- (StringSet.elements !dirs)) ^
- (Http_getter_misc.hashtbl_sorted_fold
- (fun uri (annflag, typesflag, bodyflag) cont ->
- sprintf "%sobject, %s, <%s,%s,%s>\n"
- cont uri (if annflag then "YES" else "NO")
- (string_of_ls_flag typesflag) (string_of_ls_flag bodyflag))
- objs "")
- in
- Http_daemon.respond
- ~headers:(("Content-Type", "text/plain") :: common_headers)
- ~body outchan
- | Fmt_xml ->
- let body =
- sprintf
-"<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?>
-<!DOCTYPE ls SYSTEM \"%s/getdtd?uri=ls.dtd\">
-
-<ls>
-%s
-</ls>
-"
- Http_getter_env.my_own_url
- ("\n" ^
- (String.concat
- "\n"
- (List.map
- (fun d -> "<section>" ^ d ^ "</section>")
- (StringSet.elements !dirs))) ^ "\n" ^
- (Http_getter_misc.hashtbl_sorted_fold
- (fun uri (annflag, typesflag, bodyflag) cont ->
- sprintf
-"%s<object name=\"%s\">
-\t<ann value=\"%s\" />
-\t<types value=\"%s\" />
-\t<body value=\"%s\" />
-</object>
-"
- cont uri (if annflag then "YES" else "NO")
- (string_of_ls_flag typesflag)
- (string_of_ls_flag bodyflag))
- objs ""))
- in
- Http_daemon.respond
- ~headers:(("Content-Type", "text/xml") :: common_headers)
- ~body outchan
-in
-let (index_line_sep_RE, index_sep_RE, trailing_types_RE,
- heading_cic_RE, heading_theory_RE,
- heading_rdf_cic_RE, heading_rdf_theory_RE) =
- (Pcre.regexp "[ \t]+", Pcre.regexp "\n+", Pcre.regexp "\\.types$",
- Pcre.regexp "^cic:", Pcre.regexp "^theory:",
- Pcre.regexp "^helm:rdf.*//cic:", Pcre.regexp "^helm:rdf.*//theory:")
-in
-let update_from_server logmsg server_url = (* use global maps *)
- debug_print ("Updating information from " ^ server_url);
- let xml_url_of_uri = function
- (* TODO missing sanity checks on server_url, e.g. it can contains $1 *)
- | uri when (Pcre.pmatch ~rex:heading_cic_RE uri) ->
- Pcre.replace ~rex:heading_cic_RE ~templ:server_url uri
- | uri when (Pcre.pmatch ~rex:heading_theory_RE uri) ->
- Pcre.replace ~rex:heading_theory_RE ~templ:server_url uri
- | uri -> raise (Http_getter_invalid_URI uri)
- in
- let rdf_url_of_uri = function (* TODO as above *)
- | uri when (Pcre.pmatch ~rex:heading_rdf_cic_RE uri) ->
- Pcre.replace ~rex:heading_rdf_cic_RE ~templ:server_url uri
- | uri when (Pcre.pmatch ~rex:heading_rdf_theory_RE uri) ->
- Pcre.replace ~rex:heading_rdf_theory_RE ~templ:server_url uri
- | uri -> raise (Http_getter_invalid_URI uri)
- in
- let log = ref (logmsg ^ "Processing server: " ^ server_url ^ "<br />\n") in
- let (xml_index, rdf_index, xsl_index) =
- (* TODO keeps index in memory, is better to keep them on temp files? *)
- (http_get (server_url ^ "/" ^ Http_getter_env.xml_index),
- http_get (server_url ^ "/" ^ Http_getter_env.rdf_index),
- http_get (server_url ^ "/" ^ Http_getter_env.xsl_index))
- in
- if (xml_index = None && rdf_index = None && xsl_index = None) then
- debug_print (sprintf "Warning: useless server %s" server_url);
- (match xml_index with
- | Some xml_index ->
- (log := !log ^ "Updating XML db ...<br />\n";
- List.iter
- (fun l ->
- try
- (match Pcre.split ~rex:index_line_sep_RE l with
- | [uri; "gz"] -> xml_map#add uri ((xml_url_of_uri uri) ^ ".xml.gz")
- | [uri] -> xml_map#add uri ((xml_url_of_uri uri) ^ ".xml")
- | _ -> log := !log ^ "Ignoring invalid line: " ^ l ^ "<br />\n")
- with Http_getter_invalid_URI uri ->
- log := !log ^ "Ignoring invalid XML URI: " ^ uri ^ "<br />\n")
- (Pcre.split ~rex:index_sep_RE xml_index)) (* xml_index lines *)
- | None -> ());
- (match rdf_index with
- | Some rdf_index ->
- (log := !log ^ "Updating RDF db ...<br />\n";
- List.iter
- (fun l ->
- try
- (match Pcre.split ~rex:index_line_sep_RE l with
- | [uri; "gz"] -> rdf_map#add uri ((rdf_url_of_uri uri) ^ ".xml.gz")
- | [uri] -> rdf_map#add uri ((rdf_url_of_uri uri) ^ ".xml")
- | _ -> log := !log ^ "Ignoring invalid line: " ^ l ^ "<br />\n")
- with Http_getter_invalid_URI uri ->
- log := !log ^ "Ignoring invalid RDF URI: " ^ uri ^ "<br />\n")
- (Pcre.split ~rex:index_sep_RE rdf_index)) (* rdf_index lines *)
- | None -> ());
- (match xsl_index with
- | Some xsl_index ->
- (log := !log ^ "Updating XSLT db ...<br />\n";
- List.iter
- (fun l -> xsl_map#add l (server_url ^ "/" ^ l))
- (Pcre.split ~rex:index_sep_RE xsl_index);
- log := !log ^ "All done!<br />\n")
- | None -> ());
- debug_print "done with this server";
- !log
-in
-
- (* thread action *)
-
-let callback (req: Http_types.request) outchan =
- try
- debug_print ("Connection from " ^ req#clientAddr);
- debug_print ("Received request: " ^ req#path);
- (match req#path with
- | "/help" -> return_html_raw Http_getter_const.usage_string outchan
- | "/getxml" | "/getxslt" | "/getdtd" | "/resolve" | "/register" ->
- (let uri = req#param "uri" in (* common parameter *)
- match req#path with
- | "/getxml" ->
- let enc = parse_enc req in
- let patch =
- try parse_patch req with Http_types.Param_not_found _ -> true
- in
- Http_getter_cache.respond_xml
- ~url:(resolve uri) ~uri ~enc ~patch outchan
- | "/getxslt" ->
- let patch =
- try parse_patch req with Http_types.Param_not_found _ -> true
- in
- Http_getter_cache.respond_xsl ~url:(resolve uri) ~patch outchan
- | "/getdtd" ->
- let patch =
- try parse_patch req with Http_types.Param_not_found _ -> true
- in
- Http_getter_cache.respond_dtd
- ~patch ~url:(Http_getter_env.dtd_dir ^ "/" ^ uri) outchan
- | "/resolve" ->
- (try
- return_xml_raw
- (sprintf "<url value=\"%s\" />\n" (resolve uri))
- outchan
- with Http_getter_unresolvable_URI uri ->
- return_xml_raw "<unresolved />\n" outchan)
- | "/register" ->
- let url = req#param "url" in
- register uri url;
- return_html_msg "Register done" outchan
- | _ -> assert false)
- | "/update" ->
- (Http_getter_env.reload (); (* reload servers list from servers file *)
- xml_map#clear; rdf_map#clear; xsl_map#clear;
- let log =
- List.fold_left
- update_from_server
- "" (* initial logmsg: empty *)
- (* reverse order: 1st server is the most important one *)
- (List.rev !Http_getter_env.servers)
- in
- xml_map#sync; rdf_map#sync; xsl_map#sync;
- return_html_msg log outchan)
- | "/getalluris" ->
- return_all_xml_uris
- (fun uri ->
- (Pcre.pmatch ~rex:heading_cic_RE uri) &&
- not (Pcre.pmatch ~rex:trailing_types_RE uri))
- outchan
- | "/getallrdfuris" ->
- (let classs = req#param "class" in
- try
- let filter =
- let base = "^helm:rdf:www\\.cs\\.unibo\\.it/helm/rdf/" in
- match classs with
- | ("forward" as c) | ("backward" as c) ->
- (fun uri -> Pcre.pmatch ~pat:(base ^ c) uri)
- | c -> raise (Http_getter_invalid_RDF_class c)
- in
- return_all_rdf_uris filter outchan
- with Http_getter_invalid_RDF_class c ->
- raise (Http_getter_bad_request ("Invalid RDF class: " ^ c)))
- | "/ls" -> return_ls (parse_ls_uri req) (parse_output_format req) outchan
- | "/getempty" ->
- Http_daemon.respond ~body:Http_getter_const.empty_xml outchan
- | invalid_request ->
- Http_daemon.respond_error ~status:(`Client_error `Bad_request) outchan);
- debug_print "Done!\n"
- with
- | Http_types.Param_not_found attr_name ->
- return_400 (sprintf "Parameter '%s' is missing" attr_name) outchan
- | Http_getter_bad_request msg -> return_html_error msg outchan
- | Http_getter_internal_error msg -> return_html_internal_error msg outchan
- | Shell.Subprocess_error l ->
- return_html_internal_error
- (String.concat "<br />\n"
- (List.map
- (fun (cmd, code) ->
- sprintf "Command '%s' returned %s"
- cmd (string_of_proc_status code))
- l))
- outchan
- | exc ->
- return_html_error
- ("Uncaught exception: " ^ (Printexc.to_string exc))
- outchan
-in
-
- (* daemon initialization *)
-
-let main () =
- Http_getter_env.dump_env ();
- Unix.putenv "http_proxy" "";
- at_exit save_maps;
- Sys.catch_break true;
- try
- Http_daemon.start'
- ~timeout:(Some 600) ~port:Http_getter_env.port ~mode:`Thread callback
- with Sys.Break -> () (* 'save_maps' already registered with 'at_exit' *)
-in
-
-main ()
-
projects / helm.git / blobdiff